Are you sick of casting announcements for the ensemble rom-com "New Year's Eve"? Well, too bad—because the film just picked up another actor, and it's still only about two-thirds cast. The latest addition according to Variety: Sienna Miller, who we last saw decked to the military gills in the indecipherable action thriller "G.I. Joe."

Makes sense. After all that shooting and stabbing and stuff, she could probably use a nice, light comedy.